91108 ZIP Code — San Marino, CA

Los Angeles County, California

ZIP code 91108 is located in San Marino, California, within Los Angeles County. It covers approximately 3.79 square miles and serves a population of 12,559 residents. This is a po box ZIP code in the Pacific (PT) timezone, served by area code 626.

About ZIP code 91108

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $2,000,000. Owner-occupancy is high at 82%, well above the national average.

The gap between median ($173,312) and mean household income suggests income inequality — a small number of higher earners pull the average up. 33% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 28 minutes is near the national average. Remote work is prevalent — 22% of workers work from home.

Educational attainment is high — 80% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Notable community characteristics include Spanish spoken in 25% of households.

Overall, ZIP code 91108 reflects a community defined by a highly educated population, high homeownership, a high rate of remote workers, and a significant Social Security-dependent population.

12,559

population

3.79

sq mi land

PO Box

ZIP type

Pacific (PT)

timezone

91108 ZIP code map

Cities in ZIP code 91108

Below are the cities the US Postal Service accepts for ZIP code 91108. Using any city not on this list may result in mail delivery delays.

City	Status
San Marino	Acceptable
San Marino	Preferred

Nearby ZIP codes

91775 San Gabriel (1.3 mi) 91106 Pasadena (1.4 mi) 91101 Pasadena (2.2 mi) 91801 Alhambra (2.4 mi) 91030 South Pasadena (2.4 mi) 91126 Pasadena (2.5 mi) 91110 Pasadena (2.5 mi) 91182 Pasadena (2.5 mi) 91124 Pasadena (2.5 mi) 91129 Pasadena (2.5 mi) 91125 Pasadena (2.5 mi) 91121 Pasadena (2.5 mi)

Demographics updated 06/2026

Population
Total population	12,559
Population density	3,314 / sq mi
State FIPS	06
County FIPS	037

Geography
Land area	3.79 sq mi
Water area	0.01 sq mi
Latitude	34.1212
Longitude	-118.1151
Timezone	Pacific (PT)
Area code	626

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	14.8%	36.2%	32.6%
$50k – $100k	15.8%	28.2%	27.7%
$100k – $200k	27.2%	24.5%	26.4%
Over $200k	42.2%	11.0%	13.3%

Demographics & statistics

12,559

Population

3,314

People per sq mi

45.8

Median age

$173,312

Median household income

$88,176

Per capita income

$2,000,000

Median home value

$3,501

Median monthly rent

82.4%

Home ownership

9.1%

Poverty rate

4.4%

Unemployment

3,919

Housing units

80.1%

Bachelor's or higher

Age distribution

Male Female

298

Under 5

289

401

5–9

389

355

10–14

345

484

15–19

470

230

20–24

224

666

25–34

645

660

35–44

641

982

45–54

952

429

55–59

416

463

60–64

449

805

65–74

781

435

75–84

421

167

85+

162

← Male

Female →

Age summary

Group	Count	%
Under 18	2,894	23.0%
18 and over	9,665	77.0%
65 and over	2,771	22.1%
Median age	45.8 years

Race & ethnicity

Asian 66.1%

White 24.5%

Two or more races 5%

Hispanic or Latino 3.1%

Other race 0.7%

Black or African American 0.5%

Native Hawaiian / Pacific Islander 0.1%

American Indian / Alaska Native 0.1%

Group	Count	%
Asian	8,562	66.1%
White	3,172	24.5%
Two or more races	642	5%
Hispanic or Latino	398	3.1%
Other race	95	0.7%
Black or African American	63	0.5%
Native Hawaiian / Pacific Islander	18	0.1%
American Indian / Alaska Native	7	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	14.8%	36.2%	32.6%
$50k – $100k	15.8%	28.2%	27.7%
$100k – $200k	27.2%	24.5%	26.4%
Over $200k	42.2%	11.0%	13.3%

Under $10k 5.2%

$10k–$15k 0.9%

$15k–$25k 4.0%

$25k–$35k 1.5%

$35k–$50k 4.6%

$50k–$75k 8.8%

$75k–$100k 4.8%

$100k–$150k 13.9%

$150k–$200k 12.7%

$200k+ 43.5%

Range	% of households
Under $10k	5.2%
$10k–$15k	0.9%
$15k–$25k	4.0%
$25k–$35k	1.5%
$35k–$50k	4.6%
$50k–$75k	8.8%
$75k–$100k	4.8%
$100k–$150k	13.9%
$150k–$200k	12.7%
$200k+	43.5%
Median income	$173,312

Housing

Home values

Under $50k 0.3%

$50k–$100k 0.5%

$150k–$200k 0.3%

$500k–$1M 3.1%

$1M+ 95.8%

Housing overview

Metric	Value
Median home value	$2,000,000
Median rent / month	$3,501
Owner occupied	82.4%
Renter occupied	17.6%
Vacant	13.4%
Single-family detached	97.4%
Large apartment buildings	0.0%
Mobile homes	0.0%
Median rooms	7.5
Avg household size (owned)	2.92

Year built

Era	%
2020 or later	0.4%
2010–2019	1.5%
2000–2009	1.8%
1990–1999	2.3%
1980–1989	1.1%
1970–1979	3.1%
1960–1969	7.1%
1950–1959	13.7%
1940–1949	24.7%
1939 or earlier	44.3%

Bedrooms

Size	% of units
No bedroom (studio)	0.4%
1 bedroom	0.7%
2 bedrooms	5.3%
3 bedrooms	35.3%
4 bedrooms	38.6%
5+ bedrooms	19.7%

Vehicles per household

Vehicles	% of households
No vehicle	0.8%
1 vehicle	16.4%
2 vehicles	43.7%
3 or more	39.2%

Heating fuel

Fuel type	%
Utility gas	82.6%
Electricity	14.9%
Propane / LP gas	2.1%
Wood	0.2%
No fuel used	0.2%

Households & families

Household type	Count	%
Married-couple family	2,732	68.2%
Cohabiting couple	65	1.6%
Male householder, no spouse	375	9.4%
Female householder, no spouse	832	20.8%
Households with children under 18	1,437	35.9%
Households with seniors (65+)	1,843	46.0%
Average household size	3.10

Marital status

Status	Male	Female
Never married	33.3%	25.5%
Married	63.2%	59.0%
Separated	0.3%	0.6%
Widowed	1.9%	9.9%
Divorced	1.3%	5.0%

Education

Less than 9th grade 2.5%

Some HS, no diploma 1.1%

HS graduate 5.1%

Some college, no degree 8.1%

Associate's degree 3.2%

Bachelor's degree 41.9%

Graduate / professional 38.2%

Metric	%
HS diploma or higher	96.4%
Bachelor's or higher	80.1%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	374	11.1%
Kindergarten	174	5.1%
Elementary school	1,099	32.5%
High school	820	24.3%
College / grad school	914	27.0%

Employment

Industry of employment

Education & healthcare 23.6%

Finance & real estate 17.1%

Professional & management 16.6%

Retail trade 7.3%

Manufacturing 6.9%

Wholesale trade 6.2%

Transportation & utilities 5.0%

Arts, food & hospitality 5.0%

Other services 4.3%

Information 3.1%

Public administration 2.4%

Construction 2.3%

Agriculture & mining 0.4%

Occupation

Category	%
Management, business & arts	65.2%
Service	7.3%
Sales & office	19.7%
Natural resources & construction	2.6%
Production & transportation	5.3%

Employment type

Type	%
Private sector	80.7%
Government	7.5%
Self-employed	11.3%
Unpaid family workers	0.5%

Commute

Method	%
Drive alone	62.2%
Carpool	10.0%
Public transit	4.6%
Walk	0.6%
Work from home	22.3%
Other means	0.3%
Avg commute (minutes)	28.2

Poverty

All people 9.1%

Under 18 years 4.7%

18 and over 10.4%

Married-couple families 2.9%

Female-led households 20.0%

Income support

Source	% of households
Social Security	32.7%
Retirement income	22.0%
Supplemental Security	2.4%
Cash public assistance	0.7%
Food stamps / SNAP	0.0%

Health indicators

Condition	%
Obesity	17.1%
High blood pressure	26.6%
High cholesterol	32.6%
Diabetes	8.5%
Heart disease	4.7%
Stroke	2.1%
Asthma	6.4%
Arthritis	17.1%
Kidney disease	2.3%
Pulmonary disease	3.3%
Cancer	6.7%

Behavior / access	%
Smoking	4.8%
Binge drinking	12.1%
No physical activity	13.2%
Less than 7 hrs sleep	27.9%
Depression	10.9%
Fair or poor health	7.5%
Poor mental health	9.0%
Poor physical health	5.9%
No health insurance	5.2%
Visited doctor (checkup)	68.7%
Visited dentist	76.0%
Cholesterol screening	95.7%
Teeth loss	4.0%

Veterans & disability

Veterans	Count	%
Civilian veterans	264	2.7%

Disability	%
Any disability	6.4%
Under 18	0.3%
18–64 years	3.7%
65 and over	19.6%

Health insurance coverage

Type	%
Private insurance	82.1%
Public insurance	25.1%
No insurance	4.0%
Uninsured under 19	1.9%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	11,972	95.3%
Spanish	3,021	25.2%
Other Indo-European	208	1.7%
Asian & Pacific Islander	14	0.1%
Other languages	2,799	23.4%

Place of birth & citizenship

Origin	Count	%
Native born (US)	6,601	52.6%
Born in same state	6,334	50.4%
Born in different state	5,066	40.3%
Foreign born	267	2.1%
Naturalized citizen	5,958	47.4%
Not a US citizen	3,572	60.0%

Ancestry

Ancestry	Count	%
French	493	3.9%
Italian	402	3.2%
Arab	332	2.6%
Norwegian	43	0.3%

Ancestry	Count	%
Dutch	40	0.3%
German	21	0.2%
Irish	9	0.1%

Technology access

Metric	% of households
Computer access	31.9%
Internet access	98.9%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 91108

What city is ZIP code 91108 in?

ZIP code 91108 is primarily assigned to San Marino, California.

What county is ZIP code 91108 in?

ZIP code 91108 falls within Los Angeles County, California.

How educated is the population of ZIP code 91108?

80% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

Is Spanish widely spoken in ZIP code 91108?

Approximately 25% of households in ZIP code 91108 speak Spanish as a primary language.

Is ZIP code 91108 mostly owner-occupied?

82% of occupied units in ZIP code 91108 are owner-occupied, well above the national average.

What is the median household income in ZIP code 91108?

The median household income in ZIP code 91108 is $173,312, above the national median of ~$75,000.

What timezone is ZIP code 91108 in?

ZIP code 91108 observes the PST timezone.